claude refactorings, flutter best practices, platform dependent changes, general cleanup

lib/storage/settings.dart

@@ -4,8 +4,8 @@ import 'package:json_annotation/json_annotation.dart';
 import 'dev_tools_settings.dart';
 import 'file_settings.dart';
 import 'file_view_settings.dart';
-import 'modules_settings.dart';
 import 'holidays_settings.dart';
+import 'modules_settings.dart';
 import 'notification_settings.dart';
 import 'talk_settings.dart';
 import 'timetable_settings.dart';